I've only seen the 1 (Bianca White) driving around Torquay/Paignton/Brixham area....hmmm also saw the same car parked in Lidl car park.....was the first time the wife had seen one after me going on about it for so long now.
I did a 2000 mile trip to France and back at the beginning of the month and only saw 1 the whole time! And that nearly drove into the side of me at 4 in the morning in Calais! Was too dark to tell what colour but it was one of the greys.
Two days running I have passed a white Feline on the A2 at Cobham in the morning (about 8 am) I presume it's the same car. (I've been on my bike both times so I imagine the driver is wondering why I am giving him strange looks).